JPH0240280Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Technical field of the invention This invention is an internal combustion engine that can reliably detect malfunctions in ventilation (supply, exhaust) in power generation equipment, pump equipment, etc. driven by internal combustion engines. It concerns the monitoring equipment of the engine.

(2) Description of prior art Conventionally, a diesel engine as shown in Fig. 1,
In equipment where a generator 2, pump equipment, etc. are driven by an internal combustion engine 1 such as a gas engine or a gas turbine engine, noise from ventilation air intakes and exhaust ports is dissipated to the outside surroundings so as not to disturb the environment. In this case, the above-mentioned equipment is housed in the structure 3, and in this case, the structure 3, such as the building and cover that houses the equipment, is equipped with soundproof structure ventilation for air supply or exhaust consisting of sound-absorbing materials and labyrinths. A supply air muffler 4 for ventilation and an exhaust muffler 5 for ventilation are provided. An electric fan 6 is provided on the side of the air supply port 4 to forcibly perform ventilation intake 41 and ventilation exhaust 51. Note that 7 is an exhaust muffler, which is provided to prevent noise from exhaust gas 8 generated by the internal combustion engine 1 itself. In such equipment, if the forced air supply electric fan 6 malfunctions and stops, or the intake port closes, sufficient ventilation air 41 will not be supplied to the internal combustion engine 1, and the internal combustion engine 1 will There were instances when the engine shut down due to poor combustion. Conventionally, when the electric fan 6 has stopped, an operation signal such as a detection relay is used.
Although protective measures such as overcurrent protection are in place for the power generator, if the inlet is closed, a ventilation problem cannot be detected, and the internal combustion engine may still cause combustion failure and stop. It had the disadvantage that it would cause problems.

(3) Purpose of the invention The present invention was developed in view of the above-mentioned drawbacks, and is an improvement to an internal combustion engine that can reliably monitor the supply status of ventilation air in a soundproof structure housing equipment driven by an internal combustion engine. The purpose is to provide a monitoring device.

(4) Structure of the invention The present invention is designed to monitor the indoor pressure relative to the atmospheric pressure inside the structure in which the above equipment is installed in power generation equipment, pump equipment, etc. driven by an internal combustion engine, and detect abnormalities in the air supply equipment, etc. The system includes an atmospheric differential pressure gauge, such as a U-shaped atmospheric differential pressure gauge, that detects a decrease in supply air pressure to the internal combustion engine due to the internal combustion engine.

(5) Description of Embodiment An embodiment of the present invention will be described below based on the drawings. In FIG. 2, the same symbols as in FIG. 1 are the same or equivalent. In the same figure, 3
is a soundproof structure that houses an internal combustion engine 1, a generator 2, etc., and the structure 3 has an airtight structure due to environmental concerns, so there is no natural inflow of outside air. The structure 3 is provided with an atmospheric differential pressure gauge consisting of a U-shaped tube type atmospheric differential pressure gauge 9 (referred to as a manometer) and a level detector 11. The U-shaped tube type atmospheric differential pressure gauge 9 has water,
A U-shaped pipe section containing a liquid 10 such as mercury is placed inside the structure 3, with one end of the pipe open to the atmosphere (outside the structure 3) and the other end opened inside the structure 3. be. The atmospheric differential pressure gauge detects the level of the liquid 10 in the U-shaped tube portion with a level detector 11 of a float type, optical type, etc., so that the pressure inside the structure 3 becomes negative pressure with respect to the atmosphere. The device is configured to detect when the user is getting tired.

Next, the operation of the present invention will be explained. The internal combustion engine 1 is
The electric fan 6 operates by sucking outside air supplied from the ventilation inlet 4 into the room as combustion air. At this time, the balance between the indoor pressure and the outside pressure is monitored by the level detector 11, which monitors the level of the U-shaped atmospheric pressure differential gauge 9 described above. Now, if the ventilation inlet 4 is closed or the electric fan 6 is stopped for some reason, the ventilation air supply 41 from outside will be
decreases. However, as the internal combustion engine 1 continues to operate, the pressure inside the structure 3 begins to become negative with respect to the atmosphere, and the U-tube atmospheric differential pressure gauge 9 installed inside the structure 3 operates, causing the level detector 11 to become negative. Since negative pressure phenomena are detected, occurrence of ventilation problems can be detected. Depending on the output of the level detector 11, for example, an alarm is generated and a protective operation such as selecting or cutting off the output of the generator 2 is performed before the internal combustion engine 1 generates an output abnormality. This allows you to continue supplying power to your most important loads.
The occurrence of an abnormality can be reliably detected and alerted to the operator.

(6) Effects of the invention As explained above, according to the invention, an atmospheric differential pressure gauge such as a U-tube type is installed in a structure in which a generator driven by an internal combustion engine is installed with pump equipment, etc. This makes it possible to detect a drop in atmospheric pressure. Therefore, in recent years, the requirements for soundproof structures have become stricter from the perspective of environmental hygiene, and the airtightness of structures has improved, making oxygen deficiency phenomena more likely to occur due to malfunctions in air supply-related parts. This provides an excellent effect in that ventilation problems can be detected more reliably.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the internal structure of a conventional internal combustion engine driven facility, and FIG. 2 is a diagram showing an embodiment of the present invention. 1 is an internal combustion engine, 2 is a generator, 3 is a building, 4 is an air supply port, 5 is a ventilation exhaust muffler, 6 is an electric fan,
7 is an exhaust silencer, 8 is an exhaust gas, 9 is a U-shaped tube type atmospheric differential pressure gauge, 10 is water, and 11 is a level detector.

Claims (1)

[Claims for Utility Model Registration] In a structure in which equipment such as power generation equipment and pump equipment driven by an internal combustion engine is housed in a structure, the structure is provided with a device that monitors the atmospheric pressure inside the structure and is installed in a structure that is driven by an internal combustion engine. A monitoring device for an internal combustion engine, characterized in that it is equipped with an atmospheric differential pressure gauge that detects a drop in supply air pressure to the engine.